Mehran University Research Journal of Engineering and Technology最新文献_第6页

Simulation and analysis of ideal low pass filter response using MATLAB 用MATLAB仿真分析理想低通滤波器的响应

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-21 DOI: 10.22581/muet1982.2303.12

M. Z. Shaikh, Khakoo Mal, Dillep Kumar, E. Ali, B. S. Chowdhry, E. Baro

{"title":"Simulation and analysis of ideal low pass filter response using MATLAB","authors":"M. Z. Shaikh, Khakoo Mal, Dillep Kumar, E. Ali, B. S. Chowdhry, E. Baro","doi":"10.22581/muet1982.2303.12","DOIUrl":"https://doi.org/10.22581/muet1982.2303.12","url":null,"abstract":"Filters are the crucial element of many modern electronic systems used in control engineering, wireless communication systems, and embedded systems designs. Filters in one form or another, are considered an important subsystem in developing communication systems. The ideal filter cannot be designed through any electronic circuit and the only way is to realize using simulations tools like MATLAB. In this paper, the simulation and analysis of the ideal low pass filter is presented. The MATLAB software is used to generate and perform analysis of the step response of ideal low-pass filter (Si function) and impulse response of ideal low-pass filter (Sinc function) in time and frequency domains. The aim of the work is to provide engineering students an easier understanding of the filter design process in an appropriate way with the help of simple programming. Where, it is easy to generate signals and analyze the ideal low pass filter response. To verify achievement of learning objectives, a survey is conducted from 45 engineering students of electronic and telecommunication which elicited students’ observations and interest in the learning process. Overall about 75% of students gave positive feedback, which indicates that such type of experimentation had a significant impact on the student academic outcomes.","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44593699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multipurpose modified iterative solver for nonlinear equations 非线性方程的多用途修正迭代求解器

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-21 DOI: 10.22581/muet1982.2303.17

Saher Afshan, A. H. Sheikh, Fatima Riaz, R. B. Khokhar

{"title":"Multipurpose modified iterative solver for nonlinear equations","authors":"Saher Afshan, A. H. Sheikh, Fatima Riaz, R. B. Khokhar","doi":"10.22581/muet1982.2303.17","DOIUrl":"https://doi.org/10.22581/muet1982.2303.17","url":null,"abstract":"Non-linear Eq.s occur as a sub-problem in a wide variety of engineering and scientific domains. To deal with the complexity of Non-linear Eq.s, it is often required to use numerical procedures, which are the most suitable method to employ in certain circumstances. Many classic iterative approaches have been regularly employed for various situations; nevertheless, the convergence rate of those methods is low. In many cases, an iterative approach with a faster convergence rate is needed. This is something that classical methods like the Newton-Raphson Method (NRM) cannot provide. As part of this investigation, a modification to the NRM has been suggested to speed up convergence rates and reduce computational time. Ultimately, this research aims to improve the NRM, resulting in a Modified Iterative Method (MIM). The proposed method was thoroughly examined. According to the research, the convergence rate is higher than that of NRM. The proposed method delivers more accurate results while reducing computational time and requiring fewer iterations than earlier methods. The numerical findings confirm that the promised performance is correct. The results include the number of iterations, residuals, and computing time. This innovative technique, which is appropriate to any Non-linear equation, produces more accurate approximations with less iteration than conventional methods, and it is appropriate to any Non-linear equation.","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42893813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and estimation of solar radiation of Karachi through artificial neural network (ANN) using temperature and dew-point 基于温度和露点的人工神经网络对卡拉奇太阳辐射的建模与估算

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-21 DOI: 10.22581/muet1982.2303.13

A. Idrees, N. Sadiq, Mahwish Mobeen Khan, Syed Ahmed Hassan, Zaheer Uddin Khan

{"title":"Modeling and estimation of solar radiation of Karachi through artificial neural network (ANN) using temperature and dew-point","authors":"A. Idrees, N. Sadiq, Mahwish Mobeen Khan, Syed Ahmed Hassan, Zaheer Uddin Khan","doi":"10.22581/muet1982.2303.13","DOIUrl":"https://doi.org/10.22581/muet1982.2303.13","url":null,"abstract":"The most influential source of energy in our lives is solar energy. Solar energy reaches the earth in three different forms, i.e., Global, diffused, and Direct Solar Radiation. The Solar flux at the earth's surface depends on the intensity of these radiations and is a function of the values of latitude and longitude. The earth's temperature and hence dewpoint are greatly affected by solar flux. This idea is used for predicting solar radiation with input parameters, temperature, and dewpoint along with day number and month. The method of prediction of solar radiation used in the study is Artificial Neural Network (ANN). ANN has four variables in the input, ten neurons in the hidden layer, and three output parameters GSR. DSR and BSR. Six different types of errors, namely, Root Mean Square error (RMSE), Mean Absolute Error (MABE), Mean percent error (MAPE), Chi-square, Coefficient of Determination, Kolmogorov Smirnov, have been calculated for training, testing, and validation mode to check the accuracy of estimation. The values of all the errors are low, which indicates the prediction of solar radiation is reliable.","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48190919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shape distortion in composites: sources, characterization, and remedies 复合材料的形状变形:来源、表征和补救措施

IF 0.6

Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-21 DOI: 10.22581/muet1982.2303.01

Iqra A. Rashid, K. Shaker, Yasir Nawab

引用次数: 0

An efficient LSTM based cross domain aspect based sentiment analysis (CD-ABSA) 基于高效LSTM的跨领域面向方面情感分析(CD-ABSA)

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-21 DOI: 10.22581/muet1982.2303.10

Irfan Ali Kandhro, A. Wagan, K. Kumar, Zubair Uddin Shaikh

{"title":"An efficient LSTM based cross domain aspect based sentiment analysis (CD-ABSA)","authors":"Irfan Ali Kandhro, A. Wagan, K. Kumar, Zubair Uddin Shaikh","doi":"10.22581/muet1982.2303.10","DOIUrl":"https://doi.org/10.22581/muet1982.2303.10","url":null,"abstract":"This research study focuses the cross-domain aspect-based sentiment analysis (CD-ABSA) for existing source domain annotation data. The CD-ABSA tries to use the valuable information in a source domain to extract aspect terms and evaluate their sentiment polarities in a target domain. It can considerably increase the usage of the source domain annotation resources while also reducing the workload of newer domain data annotation. one of the main components of the CD-ABSA is aspect extraction. In this paper, we utilized the most common topic modelling techniques: LDA and LSA to extract aspects from the reviews as it does not require labelled data. The topics are extracted from the education domain of the Course and Teacher Performance Evaluation (CTPE) dataset. In this paper, we also evaluated the different hyper-parameters on the CD-ABSA model and selected the best and optimal combination. The proposed methodology train on domain-dependent and independent word embedding that achieves CD-ABSA, in particularly end-to-end fashion. The experiment carries out on Academica dataset, which consists of students’ comments/feedback and SemEval-2014 dataset, which includes laptops and restaurants reviews. The evaluation metrics such as (precision, recall, F1 score and validation Accuracy) is considered while judging the LSTM classifier performance for CD-ABSA as a result.","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46228522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable solution of sewing thread attributes on seam pucker 缝线属性对起皱的可持续解决

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-07-20 DOI: 10.22581/muet1982.2303.03

M. Amir

{"title":"Sustainable solution of sewing thread attributes on seam pucker","authors":"M. Amir","doi":"10.22581/muet1982.2303.03","DOIUrl":"https://doi.org/10.22581/muet1982.2303.03","url":null,"abstract":"Bending rigidity magnitude of sewing thread provides a sustainable solution on the appearance of single needle lock stitched lightweight woven fabrics which are prone to pucker. Comparison of sewing thread bending rigidity with thread count, thread diameter, thread cyclic recovery and their resultant implication in the single lock stitched assemblies were given less consideration for the prediction and reduction of seam pucker severity. The resultant implication of physical and mechanical properties of sewing thread with rising trend of static thread tension magnitude at lock stitched sewing machine has significant impact on lightweight lock stitched fabric assemblies to predict and elude seam pucker. The present research is focused to investigate impact of the thread bending rigidity on count, diameter and cyclic recovery at 4th cycle of four cores spun sewing threads. The study concluded that sewing thread bending rigidity has high coefficient of determination of sewing thread; diameter (R2 =0.81), count (R2 =0.73) and cyclic recovery (R2 =0.77). Single needle 400 lock stitched samples of two cores spun sewing threads (t2 and t4) were prepared with ten plain weave lightweight woven fabric samples prone to pucker at four different static needle thread tensions. It is also established that combined effect of sewing thread static tension and cyclic recovery at sewing machine has significant coefficient of determination (R2>0.85 at low static thread tension and R2>0.73 at very high static thread tension) to predict and elude seam pucker severity. Research finding provides a sustainable solution to select the fine count sewing thread attuned with lightweight woven fabrics prone to pucker severity. It was observed that the Fine count sewing thread has lowest bending rigidity and 4th cyclic recovery magnitudes (R2 close to 1) to reduce or predict pucker severity for prone to pucker plain weave lightweight woven fabrics at minimum static thread tension (25gf ) on single needle lock stitched sewing machine (R2>0.81).","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":" ","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46925937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel scheme to improve lifetime and real-time support for IEEE 802.15.4 based wireless personal area networks 一种改进基于IEEE 802.15.4无线个人区域网络寿命和实时支持的新方案

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-04-03 DOI: 10.22581/muet1982.2302.14

M. N. Bhatti, Pardeep Kumar, R. Parveen, Marina Sherbaz, Umair Sheikh

引用次数: 0

Optimization and efficiency analysis of deep learning based brain tumor detection 基于深度学习的脑肿瘤检测优化及效率分析

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-04-03 DOI: 10.22581/muet1982.2302.19

Maryam Saeed, Irfan Ahmed Halepoto, Sania Khaskheli, Mehak Bushra

引用次数: 0

Techno-economic analysis of utilizing a directly-coupled photovoltaic water pumping system for domestic application in Nigeria 直接耦合光伏抽水系统在尼日利亚国内应用的技术经济分析

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-04-03 DOI: 10.22581/muet1982.2302.20

I. Okakwu, Akintunde Samson Alayande, T. Ajewole, O. Olabode

{"title":"Techno-economic analysis of utilizing a directly-coupled photovoltaic water pumping system for domestic application in Nigeria","authors":"I. Okakwu, Akintunde Samson Alayande, T. Ajewole, O. Olabode","doi":"10.22581/muet1982.2302.20","DOIUrl":"https://doi.org/10.22581/muet1982.2302.20","url":null,"abstract":"This paper presents a techno-economic application of a directly-coupled PV-pumping system for domestic application in some selected rural communities in Nigeria. Four different rural communities were considered in Ogun State, Nigeria and data of volume of water requirement per household per day were obtained through the use of interview scheduled for the rural households. The system is properly sized such that the pump energy requirement is in tandem with the PV-system of the location. Six different submersible pumps of different ratings were considered for this study. The number of PV-arrays, controllers and the tank storage capacities for various pumps were also determined. MATLAB tool is used to simulate the system. The economic assessment of the system, which includes life cycle cost, energy cost of pumps and the cubic meter cost of water were also determined. The result reveals that the life cycle cost ranges from unit cost of energy ranges from unit cost of water per cubic meter ranges from for the various submersible pumps considered. The maximum power and voltage and the efficiency of the PV module selected for the analysis are 250 W, 24 V and 14%. Also, the result also reveals that the proposed system is more cost effective than the conventional public utility water cooperation in Nigeria. The study provides the design and simulation of PV-based water pumping system, which can be used for understanding planning water supply system for rural areas.","PeriodicalId":44836,"journal":{"name":"Mehran University Research Journal of Engineering and Technology","volume":"1 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41322125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient modelling and simulation of a switched reluctance machine in different operating modes 开关磁阻电机在不同工作模式下的暂态建模与仿真

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Mehran University Research Journal of Engineering and Technology Pub Date : 2023-04-03 DOI: 10.22581/muet1982.2302.16

A. A. Memon, Chen Hao, M. H. Baloch

引用次数: 0